Electric heating unit for food cookers



July 9, 1935. s. SAUVAGE 2,007,877

ELECTRIC HEATING UNIT FOR FOOD COOKERS Filed May 5, 1934 J72 21 1%7: jfan (e9 5a a zfa ge Patented July 9, 1935 UNITED STATES ELECTR-E'C HEATING UNET FOB. F601) COOKERS Stanley Sauvage, Chicago, Ill.

-l-ppilcation May 5, 1

12 'Claims.

rial Number 667,393, filed April 22, i933, and is in p division of the said application.

It has been found that e ceramic body the heating unit absorbs considerable heat llOlll the coils or resistance elements, with the Tun that considerable time is necessary to produce the temperature desired, with a consequent consumption of current, as well as considerable loss in current.

It is one of the objects of the present invention to reduce the current consumption by providing in heating units of this character improved means for supporting or holding the coil or element spaced from, or out of contact with the Walls or face of the body unit, with the result that only a minimum mount of heat will be absorbed by the body portion, and thereby facilitate the heating or raising of the temperature within the cooking apparatus.

To the attainment of these ends and the accomplishment of other new and useful objects as will appear, the invention consists in the features of novelty in substantially the construction, combination and arrangement of the several parts hereinafter more fully described and claimed, and shown in the accompanying drawing illustrating this invention, and in which Figure l is a top plan view of a heating unit of this character, constructed in accordance with the principles of this invention, with parts broken away.

Figure 2 is a detail sectional view, tal en on line 2-45, Figi..c l, on an enlarged Figure 3 is a detail sectional view, taken on line 33, Figure 2.

The heating unit consists or body of ceramic or like hea 1. sulating material. it), and the ly c of annular construction and formed by a plurality of are shaped sections arranged end to end. Each of the sections may be provided with an ear or lug 1! adjacent the inner face and through which fastening screws or colts for the purpose anchoring the element and the sections in assembled relation.

The body thus formed provided with a pic-- rality of annular open seats iii-i i concentrically arranged, and the seats are continuous and may be of any desired depth and width.

Arranged within each of the seats and spaced in directions lengthwise cf the respective seats are lugs or projections which are formed integral with the inner face of the innermost wall of the seats. These lugs or projections may be of any desired thickness and. width and are also shaped to form portions 5 E integral with the bottoms of the seats.

Serial No. 724,082

(Cl. FEM-37) The nu:

a heating coil or resistance c ted 1 in each of the is are of a diameter conit depth and width of each ends of the coils may i one end a W and to which be connected a connection is secured one end a service wire.

The numerals it and posts at the other ends of the ductors are connected.

When the coils are inserted in the respective seats l5 and i i they will be placed under tension designate binding coil to which concausing th coils to expand slightly and this tension win cause poi-ti ns of the cells to contact with the lugs or projections 15 on the inner face of the and portions of the lugs or projections l5 at the bottom of the seats will form supports for the coils.

With this construction it will be manifest that the greater poi n of the coils will be held out of contact with the inner face of the Wall of the seat as we 1 as above the bottom of the seats so as to for. w between the coils and the faces of the valls of th seats. This will insure a minimum amount of absorption of the heat units by the walls of the seats, and necessitate only a minimum amount of current to heat the coils to the desired temperature.

Ventilating openings 23, any number of which may be provided, extend through the body member ill and register with the respective seats l3i l so as to permit of a circulation of air around the coils.

Lugs or projections may be provided on the top of the walls of the seats to project over the top or" the coils and thereby hold the coils from acciden al displacement from the seats.

Porti s of the upper face of the body may be cut away, if desired, as at and portions may cut away as at E l, on the bottom of the elements, for purpose of lig tness and also to assist in the circulation or" an with respect to the elements.

The body portion is constructed in sections for manufacturing purposes, so to facilitate and reduce the cost of manufacture, and also to necessitate a minimum amount of space when the ceramic body portion is being baked in the oven as the sh ed sections will permit of a nesting in the oven. At ti o time a minimum amount of will only be required for shipping purposes.

While the peferred form of the invention has been herein and described, it is to be understood that v i s changes may be made in the details of construction and in the cornbination and a ngeznent oi the several parts, within the scope of the claims, without departing from the spirit of this invention.

What is claimed as new is:

1. An electric heating unit of annular configuration, the opening in said unit being of a substantial diameter, said unit comprising an insulating body having open substantially parallel annular seats, exposed heating coils seated in said seats, means formed in said seats and spaced throughout the length of the coils for holding the coils out of contact with the walls of said seats, said body being of sectional construction, and an integral projecting lug formed on each of said sections and projecting into said opening, there being an opening in said lug for the reception of an anchor element.

2. An electric heating unit comprising an insulating body having open annular seats, projections on the inner face of the innermost wall of said seats and spaced in d rections lengthwise of the seats, and a heating coil seated in each of the seats, said coils being maintained under tension to cause them to contact and remain in contact with said projections, whereby extended portions of the coils will be maintained out of contact with and spaced from the inner face of the innermost wall of said seats.

3. An electric heating unit comprising an insulating body having open annular seats, projections on the inner face of the innermost wall and on the bottom of said seats and spaced in directions lengthwise of said seats, and a heating coil in and extending throughout substantially the length of each of said seats, said coils being maintained under tension and in contact with said projections, whereby the remaining portions of the coils will be held spaced from the face of the wall and bottom of said seats.

4. An electric heating unit comprising an insulating body having open annular seats, projections on the inner face of the innermost wall and on the bottom of said seats and spaced in directions lengthwise of said seats, and a heating coil in and extending throughout substantially the length of each of said seats, said coils being maintained under tension and in contact with said projections, whereby the remaining portions of the coils will be held spaced from the face of the wall and bottom of said seats, there being ventilating openings through said body and registering with said seats.

5. An electric heating unit comprising an insulating body having open annular seats, projections on the inner face of the innermost wall and on the bottom of said seats and spaced in directions lengthwise of said seats, and a heating coil in and extending throughout substantially the length of each of said seats, said coils being maintained under tension and in contact with said projections, whereby the remaining portions of the coils will be held spaced from the face of the Wall and bottom of said seats, said body being formed of a plurality of are shaped sections arranged end to end.

6. An electric heating unit comprising an insulating body having open annular seats, projections on the inner face of the innermost wall and on the bottom of said seats and spaced in directions lengthwise of said seats, a heating coil in and extending throughout substantially the length of each of said seats, said coils being maintained under tension and in contact with said projections, whereby the remaining portions being formed of a plurality of separate are shaped sections arranged end to end, and means for anchoring said sections.

7. An electric heating unit comprising an annular insulating body having one or more open annular seats, exposed heating coils seated in said seats and extending substantially throughout the length of said seats, said body being formed of a plurality of arc shaped sections arranged end to end, and an integral projecting lug projecting from the face of each of said sections and disposed beyond the side of said seat, there being an opening through said lug for the reception of an anchoring element.

8. An electric heating unit comprising an annular insulating body having open and substantially parallel annular seats, exposed heating coils seated in said seats and extending substantially throughout the length of said seats, said body being formed of a plurality of arc shaped sections arranged end to end, the seats in each section being substantially parallel, and formed integral with the sections, and projecting from the inner face thereof and disposed within the opening formed by said unit for the reception of an anchoring device.

9. As an article of manufacture for use in an annular sectional heating unit body, a segmental member having an open seat for the reception of a heating coil, said seat extending in a direction lengthwise of the member and substantially throughout the length thereof, and an anchoring lug integral with and projecting laterally beyond the outer face of one of the walls of the segment.

10. As an article of manufacture for use in an annular sectional heating unit body, a segmental member having a plurality of open seats for the reception of heating coils, said seats being substantially parallel and extending in a direction lengthwise of the member and substantially throughout the length thereof, and an anchoring lug integral with and projecting laterally beyond the outer face of one of the Walls of the segment.

11. As an article of manufacture for use in an annular sectional heating unit body, a segmental member having an open seat for the reception of a heating coil, said seat extending in a direction lengthwise of the member and substantially throughout the length thereof, an anchoring lug integral with and projecting laterally beyond the outer face of one of the walls of the segment, and projections on the inner face of the innermost wall and spaced in directions lengthwise of said seat for holding portions of a heating coil that is disposed within the seat, spaced from the face of the wall.

12. As an article of manufacture for use in an annular sectional heating unit body, a segmental member having an open seat for the reception of a heating coil, said seat extending in a direction lengthwise of the member and substantially throughout the length thereof, an anchoring lug integral with and projecting laterally beyond the outer face of one of the walls of the segment, and projections on the inner face of the innermost wall and on the bottom of the seat and spaced in directions lengthwise of said seat for holding portions of a heating coil that is disposed in the seat, spaced from the face of the wall and from the bottom of the seat.

- STANLEY SAUVAGE. 

